Source Code Cross Referenced for CompiledXMLOutputStream.java in  » Database-DBMS » Ozone-1.1 » org » ozoneDB » xml » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » Ozone 1.1 » org.ozoneDB.xml.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:         ============================================================================
004:                           The Apache Software License, Version 1.1
005:         ============================================================================
006:
007:         Copyright (C) 2000 The Apache Software Foundation. All rights reserved.
008:
009:         Redistribution and use in source and binary forms, with or without modifica-
010:         tion, are permitted provided that the following conditions are met:
011:
012:         1. Redistributions of  source code must  retain the above copyright  notice,
013:            this list of conditions and the following disclaimer.
014:
015:         2. Redistributions in binary form must reproduce the above copyright notice,
016:            this list of conditions and the following disclaimer in the documentation
017:            and/or other materials provided with the distribution.
018:
019:         3. The end-user documentation included with the redistribution, if any, must
020:            include  the following  acknowledgment:  "This product includes  software
021:            developed  by the  Apache Software Foundation  (http://www.apache.org/)."
022:            Alternately, this  acknowledgment may  appear in the software itself,  if
023:            and wherever such third-party acknowledgments normally appear.
024:
025:         4. The names "Cocoon" and  "Apache Software Foundation"  must not be used to
026:            endorse  or promote  products derived  from this  software without  prior
027:            written permission. For written permission, please contact
028:            apache@apache.org.
029:
030:         5. Products  derived from this software may not  be called "Apache", nor may
031:            "Apache" appear  in their name,  without prior written permission  of the
032:            Apache Software Foundation.
033:
034:         THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
035:         INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
036:         FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
037:         APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
038:         INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
039:         DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
040:         OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
041:         ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
042:         (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
043:         THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
044:
045:         This software  consists of voluntary contributions made  by many individuals
046:         on  behalf of the Apache Software  Foundation and was  originally created by
047:         Stefano Mazzocchi  <stefano@apache.org>. For more  information on the Apache 
048:         Software Foundation, please see <http://www.apache.org/>.
049:
050:         */
051:
052:        package org.ozoneDB.xml.util;
053:
054:        import java.io.OutputStream;
055:        import java.io.IOException;
056:        import java.io.UTFDataFormatException;
057:        import java.io.Serializable;
058:
059:        import java.util.HashMap;
060:
061:        /**
062:         *  @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>, modifications
063:         *          for Ozone by <a href="mailto:conny@smb-tec.com">Conny Krappatsch</a>
064:         */
065:        final class CompiledXMLOutputStream extends OutputStream implements 
066:                Serializable {
067:
068:            private static final boolean COMPRESS = true;
069:
070:            private final OutputStream out;
071:            private final HashMap map = new HashMap();
072:            private int indexCount = 0;
073:
074:            public CompiledXMLOutputStream(OutputStream out) throws IOException {
075:                this .out = out;
076:            }
077:
078:            public final void writeEvent(int event) throws IOException {
079:                this .out.write(event);
080:            }
081:
082:            public final void writeAttributes(int attributes)
083:                    throws IOException {
084:                OutputStream out = this .out;
085:                out.write(attributes >>> 8 & 0xFF);
086:                out.write(attributes & 0xFF);
087:                //        out.write( attributes >>> 0 & 0xFF );
088:            }
089:
090:            public final void writeString(String str) throws IOException {
091:                Integer index;
092:
093:                if (CompiledXMLOutputStream.COMPRESS) {
094:                    index = (Integer) map.get(str);
095:                } else {
096:                    index = null;
097:                }
098:
099:                if (index == null) {
100:                    int length = str.length();
101:                    if (CompiledXMLOutputStream.COMPRESS) {
102:                        map.put(str, new Integer(indexCount++));
103:                        // System.out.println( "index=" + indexCount + ", str=" + str);
104:                    }
105:                    if (length > 2 << 15) {
106:                        throw new IOException(
107:                                "String cannot be bigger than 32K");
108:                    }
109:                    this .writeChars(str.toCharArray(), 0, length);
110:                } else {
111:                    int i = index.intValue();
112:                    this .out.write(i >>> 8 & 0xFF | 0x80);
113:                    this .out.write(i & 0xFF);
114:                }
115:            }
116:
117:            public final void writeChars(char[] ch, int start, int length)
118:                    throws IOException {
119:                int utflen = 0;
120:                int c;
121:                int count = 0;
122:                int end = start + length;
123:
124:                /* looks strange but is fast */
125:                for (int i = start; i < end; i++) {
126:                    c = ch[i];
127:                    utflen += (c >= 0x0001 && c <= 0x007F) ? 1
128:                            : (c > 0x07FF) ? 3 : 2;
129:                }
130:
131:                if (utflen > 65535) {
132:                    throw new UTFDataFormatException();
133:                }
134:
135:                byte[] bytearr = new byte[utflen + 2];
136:                bytearr[count++] = (byte) (utflen >>> 8 & 0xFF);
137:                bytearr[count++] = (byte) (utflen >>> 0 & 0xFF);
138:                for (int i = start; i < end; i++) {
139:                    c = ch[i];
140:                    if (c >= 0x0001 && c <= 0x007F) {
141:                        bytearr[count++] = (byte) c;
142:                    } else if (c > 0x07FF) {
143:                        bytearr[count++] = (byte) (0xE0 | c >> 12 & 0x0F);
144:                        bytearr[count++] = (byte) (0x80 | c >> 6 & 0x3F);
145:                        bytearr[count++] = (byte) (0x80 | c >> 0 & 0x3F);
146:                    } else {
147:                        bytearr[count++] = (byte) (0xC0 | c >> 6 & 0x1F);
148:                        bytearr[count++] = (byte) (0x80 | c >> 0 & 0x3F);
149:                    }
150:                }
151:
152:                this .out.write(bytearr, 0, count);
153:            }
154:
155:            public final void write(int c) throws IOException {
156:                this.out.write(c);
157:            }
158:        }
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